Exhaust emission control
CA 2075939 C · Owner: Smith, Darren Andrew · Inventors: Smith, Darren Andrew
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of operating an internal combustion engine (20) in order to improve the control of the level of emissions in the exhaust gases, comprising the steps of at least when the engine (20) is , operating under idle and/or low load conditions at a temperature below a predetermined value applying a parasitic load to the , engine (20) to increase engine fuel demand and increasing, fueling rate to the engine (20) in response to said engine fuel demand to thereby raise the temperature of the exhaust gases. The method may further comprise the steps of raising the temperature of the air being inducted into the engine (20) and/or directly heating a catalyst (25) in the engine exhaust system …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed February 27, 1991 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.